Shortened footnote and citation:
{{sfn | Klaus | 2018 | p=}}
* {{cite book | last=Klaus | first=Fiedler, | title=Die Glaubensmissionen in Afrika | publisher=Luviri Press | date=2018-06-14 | isbn=978-99960-66-00-9 | language=de}}
Named reference:
<ref name="l992">{{cite book | last=Klaus | first=Fiedler, | title=Die Glaubensmissionen in Afrika | publisher=Luviri Press | date=2018-06-14 | isbn=978-99960-66-00-9 | language=de | page=}}</ref>